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CHA3694
RoHS COMPLIANT
31-40GHz Variable Gain Amplifier
GaAs Monolithic Microwave IC Description
The CHA3694 is a variable gain broadband three-stage monolithic amplifier. It is designed for a wide range of applications, typically commercial communication systems. The backside of the chip is both RF and DC grounded. This helps to simplify the assembly process. The circuit is manufactured with a power pHEMT process, 0.15m gate length, via holes through the substrate and air bridges. It is supplied in chip form.
On-Wafer Measurements
Vd
RFin
...
RFout
Vctrl
Vg
Main Features
Linear Gain (dB)
22 18 14 10 6 2 -2 -6 -10 -14 -18 30 31 32 33 34 35 36 37 38 39 40 41 42
Broadband performance 31-40GHz
17dB gain 25dBm output IP3 26dB gain control range ESD protected (see page 11) DC power consumption: 3.5V, 160mA Chip size: 2.41 x 2.08 x 0.07mm
Frequency (GHz)
Main Characteristics
Tamb. = 25 Vd = 3.5V C, Symbol Fop G Gc OIP3 Parameter Operating frequency range Small signal gain Gain control range 3 Output Intercept Point @ max. gain
rd
Min 31
Typ
Max 40
Unit GHz dB dB dBm
17 26 25
ESD Protection: Electrostatic discharge sensitive device. Observe handling precautions!
Ref. : DSCHA3694-8155 - 03 Jun 08 1/12 Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
Route Departementale 128 - B.P.46 - 91401 Orsay Cedex France Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
Electrical Characteristics
31-40GHz Variable Gain Amplifier
Tamb. = 25 These values are representative of on -wafer measurements. C. Symbol Fop G Parameter Operating frequency range Nominal gain @ max. gain (31-34GHz) Nominal gain @ max. gain (37-40GHz) NF Noise Figure @ nominal gain (31-34GHz) Noise Figure @ nominal gain (37-40GHz) RLin Input Return Loss (any attenuation) (31-34GHz) Input Return Loss (any attenuation) (37-40GHz) RLout Output Return Loss (any attenuation) (31-34GHz) Output Return Loss (any attenuation) (37-40GHz) OIP3 P1dB 3rd Output Intercept Point @ max. gain Output Power at 1dB gain compression @ nominal gain Gain control range Drain bias voltage Drain bias current (*) Drain current at 1dB gain compression Gate bias voltage Variable gain control voltage -1.5 Min 31 14.5 17 10 8 -4 -3 -11.5 -7 25 17 26 3.5 160 180 -0.8 +0,6 Typ Max 40 Unit GHz dB dB dB dB dB dB dB dB dBm dBm dB V mA mA V V
Gc Vd Id Idc Vg Vctrl
(*) Id not affected by Vctrl.
Ref. : DSCHA3694-8155 - 03 Jun 08
2/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
Absolute Maximum Ratings (*)
Tamb = +25 C Symbol Vd Id Vg Vctrl Pin Tch Ta Tstg Drain bias voltage Power supply quiescent current Gate bias voltage Variable gain control voltage RF input power overdrive @ 3.5V Maximum channel temperature Operating temperature range Storage temperature range Parameter
CHA3694
Values 4 200 -2.0 to +0.4 -2.0 to +1.0 5 +175 -40 to +85 -55 to +125
Unit V mA V V dBm C C C
(*) Operation of this device above anyone of these parameters may cause permanent damage.
Ref. : DSCHA3694-8155 - 03 Jun 08
3/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
31-40GHz Variable Gain Amplifier
Typical On-Wafer Measured Performance
Tamb. = +25 Vd = +3.5V, Vg tuned for Id = 160mA C,
Linear Gain versus Frequency
22 18 14 Linear Gain (dB) 10 6 2 -2 -6 -10 -14 -18 30 31 32 33 34 35 36 37 38 39 40 41 42 Frequency (GHz)
Vctrl=-1.5V Vctrl=-0.8V Vctrl=-0.7V Vctrl=-0.6V Vctrl=-0.5V Vctrl=-0.4V Vctrl=-0.3V Vctrl=0V Vctrl=+0.6V
Linear Gain versus Gain Control Voltage
22 18 14 Linear Gain (dB) 10 6 2 -2 -6 -10 -14 -18 -1,6
Freq=40GHz Freq=31GHz
-1,4 -1,2 -1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6
Gain Control Voltage (V)
Ref. : DSCHA3694-8155 - 03 Jun 08
4/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
CHA3694
Gain Control Range versus Frequency
40 36 32 Gain Control Range (dB) 28 24 20 16 12 8 4 0 30 31 32 33 34 35 36 37 38 39 40 41 42 Frequency (GHz)
Return Losses versus Frequency and Gain Control Voltage (-1,5V & +0,6V) 0
-2 -4 Return Losses (dB) -6
S11
-8 -10 -12 -14
S22
-16 -18 -20 -22 30 31 32 33 34 35 36 37 38 39 40 41 42 Frequency (GHz)
Ref. : DSCHA3694-8155 - 03 Jun 08
5/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
Tamb. = +25 Vd = +3.5V, Id = 160mA C,
Freq (GHz) 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 11,0 12,0 13,0 14,0 15,0 16,0 17,0 18,0 19,0 20,0 21,0 22,0 23,0 24,0 25,0 26,0 27,0 28,0 29,0 30,0 31,0 31,5 32,0 32,5 33,0 33,5 34,0 34,5 35,0 35,5 36,0 36,5 37,0 37,5 38,0 38,5 39,0 39,5 40,0 41,0 42,0 43,0 44,0 45,0 46,0 47,0 48,0 49,0 50,0 dB(S11) 0,0 -0,1 0,1 -0,1 -0,3 -1,5 -0,8 -0,6 -0,7 -0,7 -0,9 -1,1 -1,4 -1,9 -3,0 -4,9 -9,6 -23,3 -16,3 -10,5 -8,0 -7,0 -6,6 -6,8 -7,0 -7,2 -7,2 -7,1 -6,8 -7,2 -7,2 -7,3 -7,2 -6,9 -6,1 -5,2 -4,4 -3,9 -3,4 -3,0 -2,7 -2,8 -3,0 -3,5 -3,7 -4,3 -4,9 -5,5 -6,4 -7,6 -7,3 -4,8 -3,6 -2,9 -3,0 -3,2 -3,9 -4,6 -6,8 Ph(S11) ( ) 174 167 161 154 146 134 143 133 124 116 108 98 87 74 57 36 11 -24 151 129 113 99 87 76 70 64 59 52 47 43 39 38 38 39 39 37 32 26 20 13 6 -2 -9 -14 -19 -24 -28 -31 -34 -29 -16 -17 -28 -40 -50 -61 -73 -87 -102 dB(S12) -72,4 -70,1 -69,9 -68,1 -77,5 -63,5 -68,2 -69,1 -68,1 -63,2 -55,7 -49,7 -48,2 -47,7 -51,4 -57,1 -61,5 -62,5 -64,1 -64,4 -54,4 -50,1 -48,4 -46,4 -46,3 -47,0 -45,8 -47,6 -44,3 -47,1 -46,9 -45,9 -46,0 -43,8 -44,8 -44,3 -46,2 -45,4 -44,7 -42,8 -42,0 -41,1 -41,2 -42,5 -44,6 -44,4 -45,0 -46,4 -48,0 -51,7 -63,0 -59,6 -54,8 -59,2 -53,9 -47,4 -41,4 -39,6 -37,2
31-40GHz Variable Gain Amplifier
Typical On-Wafer Sij parameters for Vctrl = -1.5V
Ph(S12) ( ) 103 91 -127 -164 -160 -162 102 15 107 167 152 137 114 67 23 1 -25 56 110 133 149 122 130 95 70 63 64 55 52 39 49 44 45 37 31 21 19 28 26 26 14 0 -18 -30 -34 -40 -54 -64 -63 -118 -162 -73 -89 -179 146 165 111 89 53
dB(S2 1) -48,9 -50,9 -45,2 -48,5 -51,3 -45,3 -36,1 -31,6 -24,4 -17,2 -12,5 -9,0 -6,5 -4,3 -2,9 -1,5 -0,5 0,4 1,7 3,1 5,0 6,5 8,6 10,4 11,7 12,4 12,9 13,5 13,9 14,6 15,5 16,2 16,7 17,3 17,9 18,0 18,1 18,4 18,6 18,5 18,4 18,4 18,5 18,3 18,5 18,4 18,2 17,4 17,1 17,0 15,7 13,2 11,2 2,5 -10,9 -24,5 -47,2 -43,7 -29,1
Ph(S21) ( ) -50 -173 38 -41 -178 131 30 1 -32 -84 -140 166 117 70 24 -19 -60 -98 -132 -168 155 117 81 37 -8 -52 -93 -134 -176 145 106 85 62 40 14 -10 -33 -57 -83 -108 -133 -156 178 153 127 99 70 42 16 -45 -111 180 100 -4 -70 -107 142 171 96
dB(S22) -0,8 -4,5 -5,7 -0,9 -0,9 -2,0 -3,2 -4,3 -5,8 -7,4 -7,1 -6,0 -5,1 -4,5 -4,1 -3,7 -3,3 -3,2 -3,3 -3,5 -4,0 -4,7 -5,7 -6,7 -8,1 -9,9 -11,9 -14,4 -18,4 -20,5 -21,5 -20,6 -19,6 -18,4 -17,9 -16,2 -15,6 -15,2 -16,4 -17,7 -17,7 -19,8 -23,6 -50,8 -26,4 -16,9 -12,7 -9,9 -8,3 -6,9 -6,3 -5,6 -6,7 -4,3 -3,2 -3,5 -3,4 -3,0 -3,7
Ph(S22) ( ) 163 146 178 163 141 127 118 110 104 106 113 109 102 92 81 68 54 39 21 4 -14 -31 -49 -67 -85 -101 -118 -137 -172 152 88 56 49 27 24 8 -6 -18 -29 -28 -33 -51 -69 -127 96 85 66 55 38 18 5 -8 -17 -7 -26 -36 -42 -50 -57
Ref. : DSCHA3694-8155 - 03 Jun 08
6/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
Typical Measured Performance in Test Fixture
Vd = +3.5V, Vg tuned for Id = 160mA
CHA3694
Measurements in test fixture, using the proposed chip assembly, as defined page 10.
Linear Gain versus Frequency and Temperature
24 20 16 12 Linear Gain (dB) 8 4 0 -4 -8 -12 -16 -20 30 31 32 33 34 35 36 37 38 39 40 Frequency (GHz)
-50C +25C +85C
Vctrl=-1.5V
Vctrl=-0.6V Vctrl=-0.5V Vctrl=-0.4V Vctrl=+0.6V
Return Losses versus Frequency and Gain Control Voltage (-1,5V to +0,6V) 0
-2
S11
-4 Return Losses (dB) -6 -8 -10 -12 -14
S22
-16 -18 -20 -22 30 31 32 33 34 35 36 37 38 39 40 Frequency (GHz)
Ref. : DSCHA3694-8155 - 03 Jun 08
7/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
31-40GHz Variable Gain Amplifier
Gain and Output Power versus Input Power and Temperature @ 31GHz
24 22 Gain (dB) and Output Power (dBm) 20 18 16 14 12 10 8 6 4 2 0 -25 -23 -21 -19 -17 -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 Input Power (dBm)
-50C +25C +85C Vctrl=-0.7V Vctrl=-1.5V
Gain and Output Power versus Input Power and Temperature @ 34GHz
24 22 Gain (dB) and Output Power (dBm)
Vctrl=-1.5V
20 18 16 14 12 10 8 6 4 2 0 -25 -23 -21 -19 -17 -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 Input Power (dBm)
-50C +25C +85C Vctrl=-0.7V
Ref. : DSCHA3694-8155 - 03 Jun 08
8/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
CHA3694
Gain and Output Power versus Input Power and Temperature @ 37GHz
24 22 Gain (dB) and Output Power (dBm) 20 18 16 14 12 10 8 6 4 2 0 -25 -23 -21 -19 -17 -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 Input Power (dBm)
-50C +25C +85C Vctrl=-0.7V Vctrl=-1.5V
Gain and Output Power versus Input Power and Temperature @ 40GHz
24 22 Gain (dB) and Output Power (dBm) 20 18 16 14 12 10 8 6 4 2 0 -25 -23 -21 -19 -17 -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 7 Input Power (dBm)
-50C +25C +85C Vctrl=-0.7V Vctrl=-1.5V
Ref. : DSCHA3694-8155 - 03 Jun 08
9/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
31-40GHz Variable Gain Amplifier
Chip Assembly and Mechanical Data
To Vd DC Drain supply feed
120pF 10nF
To Vg DC Gate supply feed
To Vctrl DC Gate supply feed
120pF 120pF
10nF
Note : Supply feed should be capacitively bypassed. 25m diameter gold wire is recommended. RF wire bondings should be as short as possible, lower than 0.35mm. RF Pad size: 105/172m DC Pad size : 86/83m
Ref. : DSCHA3694-8155 - 03 Jun 08
10/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
31-40GHz Variable Gain Amplifier
1 625
CHA3694
1 975
2 080
540 360
625 445 1 05 1 20 1 690 1 840 2 290
000 000
2 41 0
Bonding pad positions
( Chip thickness : 70m. All dimensions are in micrometers )
Notes
- Due to ESD protection circuits on RF input and output, an external capacitance might be requested to isolate the product from external voltage that could be present on the RF accesses. Vd
RFin
RFout
...
Vg Vctrl ESD protections are also implemented on gate and control accesses.
- Due to BCB coating on the chip, qualification domain implies the chip must be glued.
Ref. : DSCHA3694-8155 - 03 Jun 08 11/12 Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHA3694
31-40GHz Variable Gain Amplifier
Ordering Information
Chip form: CHA3694-98F/00
Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors S.A.S. assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use as critical components in life support devices or systems without express written approval from United Monolithic Semiconductors S.A.S.
Ref. : DSCHA3694-8155 - 03 Jun 08
12/12
Specifications subject to change without notice
Route Departementale 128, B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09

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